Take a bowl add thick curd (hung curd). If your curd is not thick filter curd in a muslin cloth and hang it for 15 - 20 min. 

Cut the veggies in dice, also cut the paneer into cubes. 

Take a pan add besan(gram flour) and Ajwain.Fry it till you get nice aroma.  

Add all the spices into curd  one after other. Squeeze lemon into the bowl. Mix all the ingredients well. 

Firstly add veggies mix it smoothly. Now add paneer cubes to the above along with 1 tsp of oil mix it well with your hands so that paneer cubes do not break and marinade coats veggies and paneer evenly. (mix everything gently). 

Cover the lid and keep the marinade veggies and paneer cubes in refrigerator for an hour. 

After an hour remove the above from fridge and give a quick saute once. 

 Take a non-stick pan add 1 tsp of oil, place the wooden skewer. Brush some oil on top of tikka's so that it would not stick to pan

Roast it by holding both sides of skewer rotating all sides so that the marinade veggies and paneer will cook well. Roast it on medium flames otherwise it will burn. (This is the important step)

Continue the same process for remaining and take into plate. 

Tips

● If you feel coated veggies and paneer sticking to pan just add little amount of oil and rotate it, maintain low or medium flame.

● Marinade  veggies and paneer minimum 30 min. (It's must to get good taste to tikkas)

● Use non-stick pan to get good tikkas.